Cute but not stretchy
No stretch to the fabric whatsoever. However, there is a clasp at the back like a bra, so I recommend sizing up and if it's too large you can tighten it. I am a 34d, 5'6, 130 lbs and a small couldn't even reach across my ribcage. I don't even think a medium would fit. It is cute though, so 4 stars. Would not recommend if your band size is over 36 or if you're bigger than a D/maybe DD.